778074088356864 has 2816 divisors, whose sum is σ = 2884104437760000. Its totient is φ = 204476362260480.

The previous prime is 778074088356823. The next prime is 778074088356931. The reversal of 778074088356864 is 468653880470877.

778074088356864 is a `hidden beast` number, since 7 + 7 + 8 + 0 + 7 + 40 + 8 + 8 + 3 + 568 + 6 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 370687987687 + ... + 370687989785.

Almost surely, 2^{778074088356864} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778074088356864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1442052218880000).

778074088356864 is an abundant number, since it is smaller than the sum of its proper divisors (2106030349403136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

778074088356864 is a wasteful number, since it uses less digits than its factorization.

778074088356864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311 (or 2287 counting only the distinct ones).

The product of its (nonzero) digits is 12138577920, while the sum is 81.

The spelling of 778074088356864 in words is "seven hundred seventy-eight trillion, seventy-four billion, eighty-eight million, three hundred fifty-six thousand, eight hundred sixty-four".